Burner



Dec. 13, 1927.

A. A. YOST BURNER Filed Sept. 21. 1926 Patented Dec. 13, 1927.

UNITED sjiATEs PATENT OFFICE.

BURNER.

Application led September 21, 1926. Serial No. 136,775.

The invention to be hereinafter described relates to burners of the typein which liquid fuel, such as oil, and an atoinizing fluid, such as airunder pressure, are fed to` a nozzle and on delivery therefrom the airmeets the fuel, thereby atoinizing the same and promoting the combustionof the fuel.

The aim and purpose of the present invention is to provide an improvedburner which will-atomize the fuel more thoroughly than heretofore, andproduce a flame of proper whirl and spread for efficient combustion andheating effect. The fuel is conducted to a rotary cup which has anoutward flar- '15 ing inner surface to which the liquid fuel clingsunder the influence iof centrifugal force. The-atomizing fluid is fedthrough.

30 `projected in 'crossing paths, and the fuel is` thoroughlyatomize'd.l 1 i The cup is rotatedf by an electric motor,

4the speed of .which can be regulated so.Y that the cup maybe rotatedjatthe proper speed for most efficient results. `The atomized fluid maybe-forced to, and between the varies by afan which isalso rotated fbythe motor. The construction is such that the combustion will occuradjacent to the end of the nozzle lmand the flame will have a desirablespread enabling it to reach a4 large area of heating surface. y v

. One good form-of the inventiontisshown in the accompanying drawing,wherein:

Fig. 1 is a View partly in section and partly in side elevation of aburner embodying the invention;

Fig. 2 on an enlarged scale is a side eleva- 5ow thereon; andv Fig. 3 isa fronttend View of the construction shown in Fig. 2.

Referring tothe drawing, the embodiment ofc'the .invention shown thereincomprises a nozzle 1' cylindrical in form having an outlstand-ing Hange3 secured by screw bolts 5 to a -fan casing 7. Mounted inthe nozzle 1 isa rotary cup 9 having an outwardlyflaring interior Surface 11. edon oneend of a hollow sliaft 13 journalled in suitable bearings. The fuel isfed through a. pipe 15 from a suitable source of supply, and is4delivered to a pipe 17 which extends through the hollow shaft 13 and hasa tip 19 adapted to deliver the fuel to the inner flaring surface of thecup. The shaft 13 is directly rotated by an electric motor 21.

A fan 23 in the casing 7 referred to, is mounted fast on the hollowshaft 13, and air may be supplied to the fan through an inlet 25 in thecasing 7. The air entering the inlet passesto the fan and isforcedthereby into the nozzle and through the annular space between the cupand the inner surface of the nozzle.

Mounted on and projecting outward from Ithe rotary cup are a series ofvaries 27 of substantial length and preferably having their outer edgesextending substantially to the` inner surface of' the nozzle. Thesevanes, in 'the present instance, are oblique with respect to the axis ofrotation of the cup and cooperate with the outer surface ofk the cup andthe inner surface of the nozzle to form a series of passages 29 throughwhich the streams of atomizing fluid will This cup is niountdirection asindicated by the arrows iii Figs.

2 and 3. The liquid fuel delivered to the inner flaring surface of thecup will tend to cling to said surface under the influence ofcentrifugal force, and will be delivered with a pronounced whirl in aclockwise direction. The atomizing fluid sforced by the fan to thenozzle and through the passages between the varies will be dividedthereby into 'streams which will be given a whirl in a contraclockwisedirection due to the angular disposition of the vanes on the cup and dueto the fact that the speed of the motor l A-is such that the fluid isforced through thetion of therotary cup having the varies.

higher than the speed of rotation of the cup. The fuel and fluid.meeting and whirling in opposite directions, `thoroughly atoinize andbreak up the fuel, cause efficient combustion and produce a` flame ofdesirable lateral sepread which can reach a large heating surlace.

nozzle between the vaines at a speed muchi The vanes on the rotary cupare solely for the purpose ofproducing a Whirl of the fluid in adirection for promoting efeient c0mbuston of the fuel and producing aflame of the desired character. These Yanes are not for causing therotation of the cup which is produced by and under the control ot theelectric motor, the speed of which may be varied as desired.

It Will be understood that the invention is not limited to the specificembodiment shown, and that variou deviations may be made therefromWithout departing 'from the spirit and scope of the appended claim.

That is claimed ise- In a burner 'for atomized liquid `fuel. thecombination of a casing' haring' a nozzle, a shaft in the casing, n cupin the nozzle on said shaft, an electricmotor for rotating said shaftand cup, Whirl promoting varies of substantial length on and rotativeywith the cup and projecting out therefrom toward the inner surface ofthe nozzle, moans for delivering' atomizing fluid to the passages formedbetween the vaines, and means to Conduct liquid Jfuel to the cup fordelivery therefrom With a whirling motion, said runes being disposed todivide the fluid into Streams, positively Whirl Said Streams with thecup, and discharge, the Streams in a direction opposite to the directiono' rotation of the cup and the fuel leaving the same, therebyel'ectively to break up and atoinize the fuel.

ARTHUR ADDISON YOST.

